D4I multipath constant voltage power supply with NFC switching mode function

Abstract

The utility model discloses a D4I multipath constant voltage power supply with an NFC switching mode function. The D4I multipath constant voltage power supply comprises a main driving module, an input electric quantity detection module, a main control module, an NFC module, a DALI communication module, a first temperature detection module, a second temperature detection module, a three-path chopping output module, a three-path short circuit detection module and a three-path output detection module. By means of the circuit, the DALI power supply can meet the D4I standard, the power supply can be configured to work in a monotone light mode or a dimming and color modulation mode, different dimming frequencies can be selected according to different lamps, the DALI dimming power supply integrates the D4I standard and is compatible with DT6 equipment and DT8 equipment, the output power of each path can be set at will in the DT6 mode, and the DALI dimming power supply is convenient to use. A user is helped to select a relatively proper dimming control mode according to the actually used lamp load and the dimming characteristics of the lamp load.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of LED light modulation power supply, especially to a D4I multi-path constant voltage power supply with NFC switching mode function. BACKGROUND

[0002] With the rapid development of DALI power supply, users no longer satisfy single dimming, and increase color temperature adjustment and RGB color adjustment on the basis of dimming. With the energy topic becoming increasingly hot, energy monitoring of DALI dimming power supply also appears and forms a standard, which is D4I standard; the LED power supply on the market has the following shortcomings: 1. either has D4I function but no multi-path output of color temperature adjustment and RGB adjustment; 2. or has multi-path output of color temperature adjustment and RGB adjustment but no D4I function; therefore, it is necessary to provide a D4I power supply that allows users to freely configure single dimming or both dimming and color adjustment. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art. For this purpose, the utility model provides a D4I multi-path constant voltage power supply with NFC switching mode function.

[0004] The technical scheme adopted by one embodiment of the utility model to solve the technical problem is as follows: a D4I multi-path constant voltage power supply with NFC switching mode function, comprising a main drive module, an input power detection module, a main control module, an NFC module, a DALI communication module, a first temperature detection module, a second temperature detection module, a three-way chopping output module, a three-way short circuit detection module and a three-way output detection module;

[0005] The input end of the main drive module is connected to an external power supply, and the output end is connected to one end of a load and the chopping output module;

[0006] The input power detection module is connected between the external power supply and the main control module;

[0007] The NFC module is connected to the main control module and is used for configuring an output mode;

[0008] The DALI communication module is connected to the main control module and is connected to a DALI system;

[0009] The first temperature detection module is connected to the main control module and is used for detecting the temperature inside the power supply;

[0010] The second temperature detection module is connected to the main control module and is used for detecting the temperature outside the power supply;

[0011] The short circuit detection module is connected between the main control module and the chopping output module;

[0012] The output detection module is connected between the chopper output module and the other end of the load, and is used for detecting the output voltage and the output current.

[0013] The main control module can adjust the brightness, the color temperature and / or the RGB color of the load through the chopper output module according to the type of the accessed load and the output mode configured by the NFC module.

[0014] As one of the preferred embodiments of the utility model, the chopper output module comprises a MOS tube Q3, a diode D16, a capacitor C37, a capacitor C127, a resistor R32, a resistor R35, a resistor R41 and a resistor R44, the drain of the MOS tube Q3 is connected with the output detection module and one end of the capacitor C127, the other end of the capacitor C127 is connected with the V+ end, the source of the MOS tube Q3 is connected with one end of the resistor R35, one end of the resistor R32 and one end of the resistor R27 respectively, the other end of the resistor R27 is connected with the drain of the MOS tube Q3 through the capacitor C31, the other end of the resistor R32 is connected with the main drive module, the gate of the MOS tube Q3 is connected with the other end of the resistor R35, one end of the resistor R41 and one end of the resistor R44 respectively, the other end of the resistor R41 is connected with the anode of the diode D16, the cathode of the diode D16 and the other end of the resistor R44 are connected with the short circuit detection module.

[0015] As one of the preferred embodiments of the utility model, the output detection module comprises a current detection circuit connected between the chopper output module and the other end of the load and a voltage detection circuit connected between the chopper output module and the other end of the load.

[0016] As one of the preferred embodiments of the utility model, the current detection circuit includes operational amplifier OP1A, resistance R11-R13, resistance R20, resistance R50, resistance R59, capacitor C21-C23 and capacitor C56-C57, the output end of operational amplifier OP1A is connected with one end of resistance R20, one end of resistance R59 and one end of capacitor C56 respectively, the other end of resistance R20 is connected with main control module, one end of capacitor C57 and one end of resistance R50 respectively, the power supply end of operational amplifier OP1A is connected with one end of capacitor C22, one end of capacitor C23 and power supply respectively, the positive input end of operational amplifier OP1A is connected with one end of capacitor C21, one end of resistance R12 and one end of resistance R13 respectively, the other end of resistance R12 is connected with the other end of capacitor C21, the other end of resistance R13 is connected with R_CS end, the reverse input end of operational amplifier OP1A is connected with one end of resistance R11, the other end of resistance R59 and the other end of capacitor C56 respectively, the other end of resistance R11 is connected with main drive module, the ground end of operational amplifier OP1A, the other end of capacitor C57, the other end of resistance R50, the other end of capacitor C22 and the other end of capacitor C23 are connected with SGND end.

[0017] As one of the preferred embodiments of the utility model, the voltage detection circuit includes operational amplifier OP2A, resistance R121, resistance R126, resistance R128, resistance R134, resistance R137, resistance R141, capacitor C80, capacitor C84 and capacitor C88, the output end of operational amplifier OP2A is connected with one end of resistance R126, one end of resistance R137, one end of resistance R141 and one end of capacitor C88 respectively, the other end of resistance R126 is connected with main control module and one end of capacitor C84 respectively, the other end of resistance R141 is connected with main control module, the positive input end of operational amplifier OP2A is connected with one end of resistance R121, one end of capacitor C80 and one end of resistance R128 respectively, the other end of resistance R128 is connected with main drive module, the reverse input end of operational amplifier OP2A is connected with the other end of resistance R137, the other end of capacitor C88 and one end of resistance R134 respectively, the other end of resistance R134 is connected with chopping output module, the ground end of operational amplifier OP2A, the other end of capacitor C84, the other end of resistance R121, the other end of capacitor C80 are connected with SGND end.

[0018] As one of preferred embodiments of the utility model, first temperature detection module includes resistance R144, electric capacity C97 and thermistor NTC1, one end of resistance R144 accesses power supply, the other end of resistance R144 is connected with main control module, one end of thermistor NTC1 and one end of electric capacity C97 respectively, the other end of electric capacity C97 and the other end of thermistor NTC1 are connected with SGND end.

[0019] As one of preferred embodiments of the utility model, a D4 I multi-channel constant voltage power supply with NFC switching mode function further comprises a loop control module connected between the main drive module and the main control module.

[0020] As one of preferred embodiments of the utility model, a D4 I multi-channel constant voltage power supply with NFC switching mode function further comprises a bus power supply module connected with the main control module and the DALI communication module respectively.

[0021] The utility model discloses a D4 I multi-channel constant voltage power supply with NFC switching mode function, including main drive module, input electric quantity detection module, main control module, NFC module, DALI communication module, first temperature detection module, second temperature detection module, three way chopping output module, three way short circuit detection module and three way output detection module, NFC module is used to configure output mode, and the main control module can be according to the load type of access and the output mode of receiving NFC module configuration to adjust the brightness, color temperature and / or RGB color of load through chopping output module, and the above-mentioned circuit can make DALI power supply meet D4 I standard and can configure power supply to work in single light mode or light and color mode, can also select different light modulation frequency according to different lamps, makes DALI light modulation power collection D4 I standard and is compatible with DT6 equipment and DT8 equipment, and can set the output power of each way at will in DT6 mode, as long as the total output power does not exceed the nominal power of power supply, greatly increases the compatibility of the existing complex types lamps and lanterns, helps user to select more suitable light modulation control mode according to the lamps and lanterns load of actual use and its light modulation characteristics, thereby making lamps and lanterns load reach the optimal use state and light modulation effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0023] Figure 1 It is a circuit schematic diagram of a D4 I multi-channel constant voltage power supply with NFC switching mode function;

[0024] Figure 2 It is a circuit schematic diagram of EM I filter module;

[0025] Figure 3 Circuit schematic diagram for the first part of the main drive module;

[0026] Figure 4 Circuit schematic diagram for the second part of the main drive module;

[0027] Figure 5 Circuit schematic diagram for the DALI communication module;

[0028] Figure 6 Circuit schematic diagram for the loop control module;

[0029] Figure 7 Circuit schematic diagram for the input power detection module;

[0030] Figure 8 Circuit schematic diagram for the main control module;

[0031] Figure 9 Circuit schematic diagram for the bus power module;

[0032] Figure 10 Circuit schematic diagram for the NFC module;

[0033] Figure 11 Circuit schematic diagram for the short circuit detection module;

[0034] Figure 12 Circuit schematic diagram for the chopper output module;

[0035] Figure 13 Circuit schematic diagram for the current detection circuit;

[0036] Figure 14 Circuit schematic diagram for the voltage detection circuit;

[0037] Figure 15 Circuit schematic diagram for the first temperature detection module;

[0038] Figure 16 Principle block diagram of a D4I multi-channel constant voltage power supply with NFC switching mode function under the first output module;

[0039] Figure 17 Principle block diagram of a D4I multi-channel constant voltage power supply with NFC switching mode function under the second output module;

[0040] Figure 18 Principle block diagram of a D4I multi-channel constant voltage power supply with NFC switching mode function under the third output module. DETAILED DESCRIPTION

[0041] The detailed embodiments of the utility model will be described in this part, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the written part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as limiting the protection scope of the utility model.

[0042] In the description of the utility model, the meaning of multiple is more than two, greater than, less than, more than, etc. is not included in the number, above, below, etc. is included in the number. If it is described as first, second, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0043] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not used to indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as limiting the utility model.

[0044] In the utility model, unless otherwise explicitly limited, the words such as "set", "install", "connect" should be understood broadly, for example, it can be directly connected, or indirectly connected through an intermediate medium, it can be fixedly connected, or detachably connected, or integrally formed, it can be mechanically connected, or the communication or interaction relationship between two elements. The skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0045] Reference Figures 1 to 18 A D4 I multi-channel constant voltage power supply with NFC switching mode function, comprising a main drive module 10, an input power detection module 20, a main control module 30, an NFC module 40, a DALI communication module 50, a first temperature detection module 61, a second temperature detection module 62, a three-way chopping output module 70, a three-way short circuit detection module 80 and a three-way output detection module 90;

[0046] The input end of the main drive module 10 is connected to an external power supply, and the output end is respectively connected to one end of a load and the chopping output module 70;

[0047] The input power detection module 20 is connected between the external power supply and the main control module 30;

[0048] The NFC module 40 is connected with the main control module 30, and is used for configuring the output mode;

[0049] The DALI communication module 50 is connected with the main control module 30 and accesses the DALI system;

[0050] The first temperature detection module 61 is connected with the main control module 30 and is used for detecting the temperature inside the power supply;

[0051] The second temperature detection module 62 is connected with the main control module 30 and is used for detecting the temperature outside the power supply;

[0052] The short circuit detection module 80 is connected between the main control module 30 and the chopping output module 70;

[0053] The output detection module 90 is connected between the chopping output module 70 and the other end of the load and is used for detecting the output voltage and the output current;

[0054] The main control module 30 can adjust the brightness, the color temperature and / or the RGB color of the load through the chopping output module 70 according to the type of the accessed load and the output mode configured by the NFC module 40.

[0055] In the utility model, working principle is as follows:

[0056] 1) Refer to Figures 1-5 , Figure 7 , Figures 12-14, the mains L, N are connected to the main drive module 10 and the input power detection module 20 respectively after being filtered by the EMI filter module 95, the main drive module 10 converts the voltage and provides it to the load, the main control module 30 receives the dimming signal from the DALI system through the DALI communication module 50, and then outputs the PWM wave to the chopping output module 70 (the first chopping output module 70a, the second chopping output module 70b and the third chopping output module 70c) for chopping output, thereby controlling the state of the load; wherein, the LED power supply is also provided with a short circuit detection module 80 (the first short circuit detection module 80a, the second short circuit detection module 80b and the third short circuit detection module 80c) and an output detection module 90 (the first output detection module 90a, the second output detection module 90a and the third output detection module 90c) to feedback the output state, and through the input power detection module 20 to detect the input power parameter, through the first temperature detection module 61 to detect the temperature inside the power supply, through the second temperature detection module 62 to detect the temperature outside the power supply, finally through the DALI communication module 50 to report to the DALI system, to realize the management of the state of the LED power supply; wherein, the first short circuit detection module 80a, the first chopping output module 70a and the first output detection module 90a constitute the first output channel, the second short circuit detection module 80b, the second chopping output module 70b and the second output detection module 90a constitute the second output channel, and the third short circuit detection module 80c, the third chopping output module 70c and the third output detection module 90c constitute the third output channel, different load types are connected to different output channels.

[0057] 2) with reference to Figure 1 、 Figure 12In some embodiments, the first chopper output module 70a is taken as an example for illustration, the chopper output module 70 includes a MOS tube Q3, a diode D16, a capacitor C37, a capacitor C127, a resistor R32, a resistor R35, a resistor R41 and a resistor R44, the drain of the MOS tube Q3 is connected with the output detection module 90 and one end of the capacitor C127, the other end of the capacitor C127 is connected with the V+ terminal, the source of the MOS tube Q3 is connected with one end of the resistor R35, one end of the resistor R32 and one end of the resistor R27 respectively, the other end of the resistor R27 is connected with the drain of the MOS tube Q3 through the capacitor C31, the other end of the resistor R32 is connected with the main drive module 10, the gate of the MOS tube Q3 is connected with the other end of the resistor R35, one end of the resistor R41 and one end of the resistor R44 respectively, the other end of the resistor R41 is connected with the anode of the diode D16, the cathode of the diode D16 and the other end of the resistor R44 are connected with the short circuit detection module 80; the main control module 30 controls the conduction degree of the MOS tube Q3 by controlling the gate of the MOS tube Q3, thereby realizing the chopper output control of the first output channel; the second chopper output module 70b and the third chopper output module 70c control the conduction degree of the MOS tube Q5 and the MOS tube Q4 by controlling the gate of the MOS tube Q5 and the gate of the MOS tube Q4 respectively, thereby realizing the chopper output control of the second output channel and the third output channel.

[0058] 3) with reference to Figure 1 、 Figures 13-14 In some embodiments, the output detection module 90 includes a current detection circuit 91 connected between the chopper output module 70 and the other end of the load and a voltage detection circuit 92 connected between the chopper output module 70 and the other end of the load.

[0059] with reference to Figure 13, as preferred, the current detection circuit 91 comprises an operational amplifier OP1A, resistors R11-R13, resistor R20, resistor R50, resistor R59, capacitors C21-C23 and capacitors C56-C57, the output terminals of the operational amplifier OP1A are connected to one end of the resistor R20, one end of the resistor R59 and one end of the capacitor C56 respectively, the other end of the resistor R20 is connected to the main control module 30, one end of the capacitor C57 and one end of the resistor R50 respectively, the power supply terminals of the operational amplifier OP1A are connected to one end of the capacitor C22, one end of the capacitor C23 and a power supply respectively, the positive input terminals of the operational amplifier OP1A are connected to one end of the capacitor C21, one end of the resistor R12 and one end of the resistor R13 respectively, the other end of the resistor R12 is connected to the other end of the capacitor C21, the other end of the resistor R13 is connected to the R_CS terminal, the negative input terminals of the operational amplifier OP1A are connected to one end of the resistor R11, the other end of the resistor R59 and the other end of the capacitor C56 respectively, the other end of the resistor R11 is connected to the main drive module 10, the ground terminal of the operational amplifier OP1A, the other end of the capacitor C57, the other end of the resistor R50, the other end of the capacitor C22 and the other end of the capacitor C23 are connected to the SGND terminal.

[0060] Referring to Figure 14 , as preferred, the voltage detection circuit 92 comprises an operational amplifier OP2A, resistors R121, R126, R128, R134, R137, R141, capacitors C80, C84 and C88, the output terminals of the operational amplifier OP2A are connected to one end of the resistor R126, one end of the resistor R137, one end of the resistor R141 and one end of the capacitor C88 respectively, the other end of the resistor R126 is connected to the main control module 30 and one end of the capacitor C84 respectively, the other end of the resistor R141 is connected to the main control module 30, the positive input terminals of the operational amplifier OP2A are connected to one end of the resistor R121, one end of the capacitor C80 and one end of the resistor R128 respectively, the other end of the resistor R128 is connected to the main drive module 10, the negative input terminals of the operational amplifier OP2A are connected to the other end of the resistor R137, the other end of the capacitor C88 and one end of the resistor R134 respectively, the other end of the resistor R134 is connected to the chopping output module 70, the ground terminal of the operational amplifier OP2A, the other end of the capacitor C84, the other end of the resistor R121, the other end of the capacitor C80 are connected to the SGND terminal.

[0061] 4) Referring to Figure 10 , Figures 16-18, according to the load type of access, the user uses the NFC function on the mobile terminal to communicate with the NFC module 40, and then set the working mode of the LED power supply. Specifically, the master control module 30 starts working and reads the data of the NFC module 40, and the master control module confirms the current working mode, dimming frequency and power distribution through NFC data; when the master control module 30 confirms the working mode, the power supply will enter the corresponding working mode, and set the corresponding MOS tube PWM dimming frequency.

[0062] Referring to Figure 16 When the NFC module 40 configures the working mode of the power supply as the DT6 mode, the master control module 30 controls the PWM of the three output channels to change to 100% at the same time after the power supply is powered on. The master control module 30 will detect the output voltage and current of each output channel in real time, and calculate the output power of each output channel. When the load connected to a certain output channel is greater than the power allocated by the NFC module 40, the master control module 30 will control the PWM of the output to be turned on and off in a cycle, and the lamp connected to the output channel will appear to be hiccuping to prompt that the output channel is overloaded.

[0063] Referring to Figure 17 When the NFC module 40 configures the working mode of the power supply as the DT8-RGB mode, the master control module 30 will open the three PWM outputs after the power supply is powered on. The sum of the three output PWM is 100%. At this time, the RGB color of the power supply can be adjusted. When the color is adjusted to the maximum red, the output PWM of the first output channel reaches 100%, and the output PWM of the second output channel and the third output channel will be turned off. When the color is adjusted to the maximum green, the output PWM of the second output channel reaches 100%, and the output PWM of the first output channel and the third output channel will be turned off. When the color is adjusted to the maximum blue, the output PWM of the third output channel reaches 100%, and the output PWM of the first output channel and the second output channel will be turned off. At this time, the D4 I output current and output power monitoring only calculate the sum of the three output channels.

[0064] Referring to Figure 18 When the NFC module 40 configures the working mode of the power supply as the DT8-TC mode, the master control module 30 will close the PWM output of the third output channel, and control the PWM of the first output channel and the second output channel to output 50% respectively and in a complementary state. At this time, the color temperature of the power supply can be adjusted. When the color temperature is adjusted to the coldest, the output PWM of the first output channel reaches 100%, and the output PWM of the second output channel will be turned off. When the color temperature is adjusted to the warmest, the output PWM of the first output channel will be turned off, and the output PWM of the second output channel reaches 100%. In order to avoid circuit interference, the D4 I output current and output power monitoring only calculate the sum of the first two output channels at this time.

[0065] It should be noted that, regardless of the working mode of the power supply, when different PWM dimming frequencies are switched through the NFC module 40, the output current, output power reported by the power supply and the actual output current, output power should not be much different, and the different brightness levels under different PWM dimming frequencies, when the output is open, the power supply can accurately report the open circuit state.

[0066] 5) The utility model discloses the advantages are in: through above -mentioned circuit can make DALI power supply both meet D4I standard and can configure power supply work in single dimming mode or dimming color mode, can also select different dimming frequency according to different lamps and lanterns, make DALI dimming power supply collection D4I standard and compatible DT6 equipment and DT8 equipment, and can set the output power of every way at will in DT6 mode, as long as total output power does not exceed the nominal power of power supply, greatly increase the compatibility of the existing complicated variety lamps and lanterns, help user to select more appropriate dimming control mode according to actual use lamp load and its dimming characteristic, thereby make lamp load reach optimal use state and dimming effect.

[0067] Referring to Figure 15 In some embodiments, the first temperature detection module 61 includes a resistor R144, a capacitor C97 and a thermistor NTC1, one end of the resistor R144 is connected to a power supply, the other end of the resistor R144 is connected with the main control module 30, one end of the thermistor NTC1 and one end of the capacitor C97 respectively, the other end of the capacitor C97 and the other end of the thermistor NTC1 are connected with the SGND end; It should be noted that the second temperature detection module 62 can use the same circuit as the first temperature detection module 61, the difference is that the thermistor of the second temperature detection module 62 is located outside the LED power supply, which is used to detect the external temperature of the LED power supply.

[0068] Referring to Figure 6 In some embodiments, the D4I multi-channel constant voltage power supply with NFC switching mode function further comprises a loop control module 93 connected between the main drive module 10 and the main control module 30.

[0069] Referring to Figure 9 In some embodiments, the D4I multi-channel constant voltage power supply with NFC switching mode function further comprises a bus power supply module 94 connected with the main control module 30 and the DALI communication module 50 respectively; for supplying power to the DALI communication module 50.

[0070] Of course, the utility model is not limited to the above-mentioned embodiment, and the skilled person in the art can also make equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications and replacements are all included in the range defined by the claims of the present application.

Claims

1. A D4I multi-channel constant voltage power supply with NFC switching mode function, characterized by: It comprises a main driving module (10), an input power detection module (20), a main control module (30), an NFC module (40), a DALI communication module (50), a first temperature detection module (61), a second temperature detection module (62), a three-way chopping output module (70), a three-way short-circuit detection module (80), and a three-way output detection module (90); The input end of the main driving module (10) is connected to an external power supply, and the output end is connected to one end of the load and the chopping output module (70); The input power detection module (20) is connected between the external power supply and the main control module (30); The NFC module (40) is connected to the main control module (30) and is used to configure the output mode; The DALI communication module (50) is connected to the main control module (30) and accesses the DALI system; The first temperature detection module (61) is connected to the main control module (30) and is used to detect the temperature inside the power supply; The second temperature detection module (62) is connected to the main control module (30) and is used to detect the temperature outside the power supply; The short-circuit detection module (80) is connected between the main control module (30) and the chopping output module (70); The output detection module (90) is connected between the chopping output module (70) and the other end of the load, and is used to detect the output voltage and output current; The main control module (30) can adjust the brightness, color temperature and / or RGB color of the load through the chopping output module (70) according to the type of the connected load and the output mode configured by the NFC module (40).

2. The D41 multi-channel constant voltage power supply with NFC switching mode function according to claim 1, characterized in that: The chopping output module (70) includes a MOS tube Q3, a diode D16, a capacitor C37, a capacitor C127, a resistor R32, a resistor R35, a resistor R41, and a resistor R44. The drain of the MOS tube Q3 is connected to the output detection module (90) and one end of the capacitor C127, the other end of the capacitor C127 is connected to the V+ end, the source of the MOS tube Q3 is respectively connected to one end of the resistor R35, one end of the resistor R32, and one end of the resistor R27, the other end of the resistor R27 is connected to the drain of the MOS tube Q3 via the capacitor C31, the other end of the resistor R32 is connected to the main drive module (10), the gate of the MOS tube Q3 is respectively connected to the other end of the resistor R35, one end of the resistor R41, and one end of the resistor R44, the other end of the resistor R41 is connected to the anode of the diode D16, and the cathode of the diode D16 and the other end of the resistor R44 are connected to the short circuit detection module (80).

3. The D41 multi-channel constant voltage power supply with NFC switching mode function according to claim 1, characterized in that: The output detection module (90) comprises a current detection circuit (91) connected between the chopping output module (70) and the other end of the load, and a voltage detection circuit (92) connected between the chopping output module (70) and the other end of the load.

4. The D41 multi-channel constant voltage power supply with NFC switching mode function according to claim 3, characterized in that: The current detection circuit (91) includes an operational amplifier OP1 A, resistors R11-R13, resistor R20, resistor R50, resistor R59, capacitors C21-C23 and capacitors C56-C57, the output end of the operational amplifier OP1 A is respectively connected to one end of the resistor R20, one end of the resistor R59 and one end of the capacitor C56, the other end of the resistor R20 is respectively connected to the main control module (30), one end of the capacitor C57 and one end of the resistor R50, the power supply end of the operational amplifier OP1 A is respectively connected to one end of the capacitor C22, one end of the capacitor C23 and the power supply, the positive input end of the operational amplifier OP1 A is respectively connected to one end of the capacitor C21, one end of the resistor R12 and one end of the resistor R13, the other end of the resistor R12 is connected to the other end of the capacitor C21, the other end of the resistor R13 is connected to the R_CS end, and the operational amplifier OP1 The inverting input end of A is respectively connected to one end of the resistor R11, the other end of the resistor R59 and the other end of the capacitor C56, the other end of the resistor R11 is connected to the main driving module (10), and the ground end of the operational amplifier OP1 A, the other end of the capacitor C57, the other end of the resistor R50, the other end of the capacitor C22 and the other end of the capacitor C23 are connected to the SGND end.

5. The D41 multi-channel constant voltage power supply with NFC switching mode function according to claim 3, characterized in that: The voltage detection circuit (92) includes an operational amplifier OP2A, a resistor R121, a resistor R126, a resistor R128, a resistor R134, a resistor R137, a resistor R141, a capacitor C80, a capacitor C84 and a capacitor C88, the output end of the operational amplifier OP2A is respectively connected to one end of the resistor R126, one end of the resistor R137, one end of the resistor R141 and one end of the capacitor C88, the other end of the resistor R126 is respectively connected to the main control module (30) and one end of the capacitor C84, the other end of the resistor R141 is connected to the main control module (30), and the output end of the operational amplifier OP2A is respectively connected to one end of the resistor R126, one end of the resistor R137, one end of the resistor R141 and one end of the capacitor C88. The positive input end of the operational amplifier OP2A is respectively connected to one end of the resistor R121, one end of the capacitor C80 and one end of the resistor R128, the other end of the resistor R128 is connected to the main drive module (10), the negative input end of the operational amplifier OP2A is respectively connected to the other end of the resistor R137, the other end of the capacitor C88 and one end of the resistor R134, the other end of the resistor R134 is connected to the chopping output module (70), and the ground end of the operational amplifier OP2A, the other end of the capacitor C84, the other end of the resistor R121 and the other end of the capacitor C80 are connected to the SGND end.

6. The D41 multi-channel constant voltage power supply with NFC switching mode function according to claim 1, characterized in that: The first temperature detection module (61) includes a resistor R144, a capacitor C97, and a thermistor NTC1. One end of the resistor R144 is connected to a power supply, and the other end of the resistor R144 is respectively connected to the main control module (30), one end of the thermistor NTC1, and one end of the capacitor C97. The other end of the capacitor C97 and the other end of the thermistor NTC1 are connected to the SGND end.

7. The D41 multi-channel constant voltage power supply with NFC switching mode function according to claim 1, characterized in that: It also includes a loop control module (93) connected between the main drive module (10) and the main control module (30).

8. The D41 multi-channel constant voltage power supply with NFC switching mode function according to claim 1, characterized in that: It also includes a bus power supply module (94) connected to the main control module (30) and the DALI communication module (50) respectively.

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